Analog Oscilloscope
Model: MOS-620/MOS-640

Specification

Vertical system
Verticals resolution: 8bits (28point/DIV)
Accuracy: ± 3% ± 0.4mm ( × 5MAG: ± 5% ± 0.4mm)
Equivalent bandwidth: ± 3% ± 0.4mm( × 5MAG: ± 5% ± 0.4mm) -3dB, Sine Interpolate
Interpolation: Sine/Line
Horizontal System
Maximum Sample Rates: 20MS/s
Horizontal resolution: 10bit (100point/DIV)
Time base: 0.2μs/DIV~10s/DIV ( × 10MAG:1s/DIV~20ns/DIV)
Sweep mode: AUTO, NORM, ROLL.
Saved waveform expand rate: Maximum 100
Trigger
Trigger preset: DIV2, 5, 8
Acquisition
Dual Channel Acquisition:
10s/DIV~0.5s/DIV:CHOP; 0.2ms/DIV~0.2s/DIV: ALT
Acquisition Length: 1024Byte/CH
Display
View time: 0.2s~5s Adjustable
Display Memory Length: 1024Byte/CH
Reference Memory Length: 1024Byte/CH
RS232 interface transfer rate: 19200
VERTICAL AXIS
Sensitivity: 5mV~5V/DIV,10 steps in 1-2-5 sequence
Sensitivity accuracy:≤3% , (× 5 MAG:≤ 5% )
Vernier vertical sensitivity: To 1/2.5 or less of panel-indicated value
Frequency bandwidth: DC~20MHz( × 5MAG:DC~7MHz); AC coupling:Low limit frequency 10Hz.(With reference to 100KHz, 8DIV. Frequency response with-3dB.)
Rise time: Approx.17.5ns ( × 5MAG:Approx.50ns)
Input impedance: Approx.1MΩ /Approx.25pF
Square wave characteristics: Overshoot:≤ 5%(At 10mV/DIV range); Other distortions and other ranges:5% added to the above value
Dc balance shift: Adjustable on panel
Linearity: <± 0.1DIV of amplitude change when waveform of 2DIV at graticule center is moved vertically
Vertical modes:
CH1 single channel; CH2 single channel;
DUAL: CH1 and CH2 are displayed simultaneously. ALT or CHOP selectable at any sweep rate;
ADD:CH1+CH2 algebraic addition
Chopping repetition frequency: Approx.250KHz
Input coupling: AC, GND , DC
Maximum input voltage: 300Vpeak (AC: frequency 1KHz or lower);When set probe switch at 1:1, the maximum effective readout is 40Vpp(14Vrms at sine wave),or set probe switch at 10:1,the maximum effective readout is 400Vpp(140Vrms at sine wave).
Common mode rejection ratio: 50:1 or better at 50KHz sinusoidal wave.(When sensitivities of CH1 and CH2 are set equally)
Isolation between channels(At 5mV/DIV range): > 1000:1 at 50KHz;
> 30:1 at 20MHz
CH1 signal output: At least 20mV/DIV into a 50Ω termination. Bandwidth is 50Hz to at least 5MHz
CH2 INV BAL: Balanced point variation: ≤1DIV(Reference at center graticule)
TRIGGERING
Triggering source: CH1, CH2, LINE, EXT
Coupling: AC: 20Hz to 20MHz
Slope: +/-
Sensitivity: 20Hz~2MHz: 0.5DIV, TRIG-ALT:2DIV, EXT:200mV; 2~2MHz:1.5DIV TRIG-ALT:3DIV, EXT:800mV;
TV: Sync pulse more than 1DIV (EXT:1V)
Triggering modes: AUTO; NORM: TV-V: TV-H: (Both TV-V and TV-H synchronize only when the synchronizing signal is negative)
EXT triggering signal input: Input impedance/:Approx:1MΩ/approx.25pF; Max.input voltage 300V(DC+AC peak), AC: Frequency not higher than 1KHz
HORIZIONTAL AXIS
Sweep time: 0.2μ Sec~0.5Sec/DIV, 20steps in 1-2-5 sequence;
Sweep time accuracy: ± 3%; Vernier sweep time control: ≤ 1/2.5 of panel-indicated value;
Sweep magnification: 10 times; × 10MAG sweep time accuracy: ±5 %(20nSec~50nSec are uncalibrated);
Linearity: ± 3%, × 10MAG: ±5 %(20nSec~50nSec are uncalibrated);
Position shift caused by × 10MAG: Within 2DIV. at CRT screen center
X-Y MODE: Sensitivity: Same as vertical axis. (X-axis: CH1 input signal;Y-axis:CH2 input signal.); Frequency bandwidth: DC to at least 500KHz; X-Y phase difference:± 3°at DC-50KHz
Z AXIS
Sensitivity: 5Vp-p (Positive-going signal decreases intensity);
Frequency bandwidth: DC~2MHz; Input resistance: Approx.47KΩ ;
Maximum input voltage:3V(DC+AC peak, AC frequency≤1KHz)
CALIBRATION VOLTAGE
Waveform: Positive-going square wave;
Frequency: Approx.1KHz; Duty ratio: Within 48:52; Output voltage: 2Vp-p ± 2%;
Output impedance: Approx.1KHz
CRT
Type: 6-inch rectangular type, internal graticule; Phosphor: P31;Acceleration voltage: Approx.2KV; Effective screen size: 8 × 10DIV(1DIV=10mm(0.39in)); Graticule: Internal; Trace rotation: Provided

NOTE 

20MHz Dual Channel
High sensitivity 1mV/DIV
Z Axis Input
CH1 Output
10 times sweep magnification
TV Synchronization, X-Y mode
High luminance, internal graticule Toshiba CRT
Fmax=20MS/s
Store depth:1K × CH2+1K × 2(Reference Memories)
Preset triggering function, pre-trigger signal observation
Two channel, two reference waveform display Simultaneous 4 Waveforms Information
The minimum sweeping speed is 10s/DIV, The ration measures ultra low frequency signals
Measure and display Single shot, Non-period Signals Built in RS232 interface for communication with the computer Analog, ultra low speed and storage oscilloscope, three in one high performance with low price